diff --git a/source/bforce/prot_binkp.c b/source/bforce/prot_binkp.c
index c3d0e6a..3604b69 100644
--- a/source/bforce/prot_binkp.c
+++ b/source/bforce/prot_binkp.c
@@ -740,7 +740,7 @@ case BPMSG_PWD:              /* Session password */
             /* Do authorization */
 	    if( binkp_auth_incoming(bstate->remote_data) ) {
 	        log("error: invalid password");
-	        if( bstate->extracmd[0] !=-1 ) return 0; // suspend if extra is occupied
+	        if( bstate->extracmd[0] != (char)-1 ) return 0; // suspend if extra is occupied
 	        bstate->extracmd[0] = BPMSG_ERR;
 	        strcpy(bstate->extracmd+1, "Security violation");
 	        bstate->extraislast = true;
@@ -749,7 +749,7 @@ case BPMSG_PWD:              /* Session password */
 	    // lock addresses
 	    if( session_addrs_lock(state.remoteaddrs, state.n_remoteaddr) ) {
 	        log("error locking addresses of the remote");
-	        if( bstate->extracmd[0] !=-1 ) return 0; // suspend if extra is occupied
+	        if( bstate->extracmd[0] != (char)-1 ) return 0; // suspend if extra is occupied
 	        bstate->extracmd[0] = BPMSG_BSY;
 	        strcpy(bstate->extracmd+1, "All addresses are busy");
 	        bstate->extraislast = true;
@@ -770,6 +770,7 @@ case BPMSG_FILE:             /* File information */
             s_bpfinfo recvfi;
             if( binkp_parsfinfo(buf+1, &recvfi, true) ) {
 		log ("M_FILE parse error: %s", buf + 1);
+		DEB((D_24554, "M_FILE parse error: %s", buf + 1 ));
 		PROTO_ERROR("invalid M_FILE");
             }
             bstate->batch_recv_count += 1;
@@ -786,7 +787,7 @@ case BPMSG_FILE:             /* File information */
 		    return 1;
 	        }
 	        DEB((D_24554, "no, skipping; TODO: accept it"));
-		if( bstate->extracmd[0] != -1 ) return 0;
+		if( bstate->extracmd[0] != (char)-1 ) return 0;
 		bstate->extracmd[0] = BPMSG_SKIP;
 		sprintf(bstate->extracmd+1, "%s %ld %ld %ld", recvfi.fn, recvfi.sz, recvfi.tm, recvfi.offs);
 		bstate->extraislast = false;
@@ -798,7 +799,7 @@ case BPMSG_FILE:             /* File information */
 	        PROTO_ERROR("invalid mode for M_FILE");
 	    }
 
-            if( bstate->extracmd[0] != -1 ) return 0;
+            if( bstate->extracmd[0] != (char)-1 ) return 0;
 	    switch(p_rx_fopen(bstate->pi, recvfi.fn, recvfi.sz, recvfi.tm, 0)) {
 case 0:
 		if (bstate->pi->recv->bytes_skipped == recvfi.offs) {